QUICK-CHANGE DEVICE

Abstract

A quick-change device for a rotary power tool, such as a circular saw, comprising: a grip hub; a threaded bolt; a bolt key; wherein the bolt key is connected to the threaded bolt, such that the bolt key has at least an extended position and a collapsed position; wherein the threaded bolt is configured to pass through a bolt hole of the grip hub and threadably connect to a spindle of a circular saw; wherein the bolt key is configured to be able to be unscrewed from the spindle when in the extended position, such that an external tool is not needed to remove the threaded bolt from the spindle; wherein the bolt key is configured to matingly stow next to the grip hub when the bolt key is flipped down into the collapsed position; and wherein the threaded bolt may be quickly and safely removed and reengaged for the purpose of switching one or more saw blades.

Claims

1. A quick-change device for a circular saw, comprising: a grip hub; a threaded bolt; a bolt key wherein said bolt key is connected to said threaded bolt, such that said bolt key has at least an extended position and a collapsed position; wherein said threaded bolt is configured to pass through a bolt hole of said grip hub and threadably connect to a spindle of a circular saw; wherein said bolt key is configured to be able to be unscrewed from said spindle when in said extended position, such that an external tool is not needed to remove said threaded bolt from said spindle; wherein said bolt key is configured to matingly stow next to said grip hub when said bolt key is flipped down into said collapsed position; and wherein said threaded bolt may be quickly and safely removed and reengaged for the purpose of switching one or more saw blades.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are of illustrative embodiments. They do not illustrate all embodiments. Other embodiments may be used in addition or instead. Details which may be apparent or unnecessary may be omitted to save space or for more effective illustration. Some embodiments may be practiced with additional components or steps and/or without all of the components or steps which are illustrated. When the same numeral appears in different drawings, it refers to the same or like components or steps.

[0017] FIG. 1 is an exploded perspective view of one embodiment of the quick-change device.

[0018] FIG. 2 is a front view of one embodiment of the quick-change device.

[0019] FIG. 3 is a side view of one embodiment of the quick-change device.

[0020] FIG. 4 is a side view of one embodiment of the quick-change device connected to a circular saw.

[0021] FIG. 5 is a perspective view of one embodiment of the quick-change device showing how the bolt key allows the user to unscrew the bolt without an external tool.

[0022] FIG. 6 is a close-up side view of a second embodiment of the quick-change device with a cam key.

[0023] FIG. 7 is an exploded perspective view of a second embodiment of the quick-change device.

[0024] FIG. 8 is a close-up side view of a third embodiment of the quick-change device.

[0025] FIG. 9 is an exploded perspective view of a third embodiment of the quick-change device.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In the following detailed description of various embodiments of the present disclosure, numerous specific details are set forth in order to provide a thorough understanding of various aspects of one or more embodiments of the present disclosure. However, one or more embodiments of the present disclosure may be practiced without some or all of these specific details. In other instances, well-known methods, procedures, and/or components have not been described in detail so as not to unnecessarily obscure aspects of embodiments of the present disclosure.

[0027] While multiple embodiments are disclosed, still other embodiments of the present disclosure will become apparent to those skilled in the art from the following detailed description, which shows and describes illustrative embodiments of the present disclosure. As will be realized, the device of the present disclosure is capable of modifications in various obvious aspects, all without departing from the spirit and scope of the present disclosure. Accordingly, the screen shot figures, and the detailed descriptions thereof, are to be regarded as illustrative in nature and not restrictive. Also, the reference or non-reference to a particular embodiment of the present disclosure shall not be interpreted to limit the scope of the present disclosure.

[0028] FIG. 1 is an exploded perspective view of one embodiment of the quick-change device. As shown in FIG. 1, the device 100 may comprise a grip hub 102, grips 103, bolt hole 105, dowel pins 107, pin holes 109, bolt 120, threads 122, flange 124, key connector 126, bolt key 130, bolt key pin 133, and plunger 135, which may be used to frictionally stow the key 130.

[0029] FIG. 2 is a front view of one embodiment of the quick-change device. FIG. 2 shows that the device 200 may comprise a grip hub 202, grips 203, flange 224, key connector 226, and bolt key 230. The grip hub 202 may have an indentation 250 which may allow the key connector 226 to completely and flatly collapse against the grip hub 202, such that the key connector 226 may be in a stowed position.

[0030] FIG. 3 is a side view of one embodiment of the quick-change device. As shown in FIG. 3, the device 100 may comprise a grip hub 102, grips 103, bolt 120, threads 122, and bolt key 130.

[0031] FIG. 4 is a side view of one embodiment of the quick-change device connected to a circular saw. FIG. 4 shows that the device 100 may comprise grip hub 102, bolt 120, bolt key 130, and spindle threads 123. The device may be installed on a rotary tool such as circular saw 400, which may comprise blade 402, internal hub 405, and spindle 410. The spindle threads 123 may screw into spindle 410. When the bolt 120 is removed, the blade 402 may be swapped out for a new blade.

[0032] FIG. 5 is a perspective view of one embodiment of the quick-change device showing how the bolt key allows the user to unscrew the bolt without an external tool. FIG. 5 shows that the grip hub 102 may be held in place against the blade 402, the bolt key 130 may be lifted out of its collapsed position and then turned in the same direction as the saw blade rotates, typically counterclockwise for a right-handed saw. In this manner, the key 130 turns the key connector 126, such that the bolt is removed from the spindle and the blade 402 may be removed.

[0033] FIG. 6 is a close-up side view of a second embodiment of the quick-change device with a cam key. FIG. 6 shows that the device 600 may comprise grip hub 602, bolt 620, cam bolt key 630, and spindle threads 623. The device may be installed on circular saw 400, which may comprise blade 402, internal hub 405, and spindle 410. The spindle threads 623 may screw into spindle 410. When the bolt 620 is removed, the blade 402 may be swapped out for a new blade. The key 630 may be a cam, which, when flipped out of its collapsed placement, may release pressure on the grip hub 602, such that grip hub 602 moves 688 outward from blade 402. This is shown by space 699.

[0034] FIG. 7 is an exploded perspective view of a second embodiment of the quick-change device. As shown in FIG. 7, the device 600 may comprise a grip hub 602, grips 603, bolt hole 605, dowel pins 607, bolt 620, threads 622, key connector 626, bolt key 630, bolt key pin 633, and indentation 640.

[0035] FIG. 8 is a close-up side view of a third embodiment of the quick-change device. FIG. 6 shows that the device 800 may comprise grip hub 802, bolt 820, cam bolt key 830, and spindle threads 823. The device may be installed on circular saw 400, which may comprise blade 402, internal hub 405, and spindle 410. The spindle threads 823 may screw into spindle 410. When the bolt 820 is removed, the blade 402 may be swapped out for a new blade.

[0036] FIG. 9 is an exploded perspective view of a third embodiment of the quick-change device. As shown in FIG. 7, the device 800 may comprise a grip hub 802, grips 803, bolt hole 805, dowel pins 807, bolt 820, threads 822, key connector 826, bolt key 830, bolt key pin 833, indentation 840 and plunger 835.

[0037] The foregoing description of the preferred embodiment has been presented for the purposes of illustration and description. While multiple embodiments are disclosed, still other embodiments will become apparent to those skilled in the art from the above detailed description. These embodiments are capable of modifications in various obvious aspects, all without departing from the spirit and scope of protection. Accordingly, the detailed description is to be regarded as illustrative in nature and not restrictive. Also, although not explicitly recited, one or more embodiments may be practiced in combination or conjunction with one another. Furthermore, the reference or non-reference to a particular embodiment shall not be interpreted to limit the scope of protection. It is intended that the scope of protection not be limited by this detailed description, but by the claims and the equivalents to the claims that are appended hereto.

[0038] Except as stated immediately above, nothing that has been stated or illustrated is intended or should be interpreted to cause a dedication of any component, step, feature, object, benefit, advantage, or equivalent, to the public, regardless of whether it is or is not recited in the claims.